anderson



(ModeL) 2 Sheets-Sheet 1 0. ANDERSON.

1 011111. Y No. 241,774, Patented May 24, I881.

' WITNESSES INVENTOR 1 1 ATTORNEY -2 Sheets-Sheet 2;

N 0 S 31 EU huh A C a d 0 M NO. 241 ,7745 Patented May 24,1881.

INVENTOR r s ATTORNEY WITNESSES N. PETERS. Pholombogrwher, Wllhlllglnn, D. C.

UNITED STATES PATENT OFFICE.

CHARLES ANDERSON, OF SOUTH BEND, INDIANA, ASSIGNOR TO SOUTH 1 BEND IRON WORKS, OF SAME PLACE.

SPECIFICATION forming part of Letters Patent No. 241,774, dated May 24, 1881,

Application filed April 16, 1881. (Model) To all whom it may concern.-

Be it known that I, OHARLEsANDERsoNmf South Bend, in the county of St. Joseph and State 05 Indiana, have invented certain new and useful Improvements in Chills; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use it, reference being had to the accompanying drawings, which form part of this specification.

My invention relates to an improvement in chills to be used in the manufacture of chilled plowshares, the object being to provide a sectional chill composed of two pieces of cast-iron, constructed to be locked together when being used in chilling, and to be readily separated to facilitate the operation of molding, and adapted, by its peculiar form and configuration, to chill the nose and the opposite sides of the edges of plowshares, insuring to them uniformity of granular structure, hardness, and symmetry, a gradual blending of the chilled and unchilled metal, and, in proportion tothe number of shares cast, a higher rateof perfection of product than has before been obtained.

With these ends in view, my invention con sists in certain details of construction and combinations of parts, as will hereinafter be described, and pointed out in the claims.

In the accompanying drawings, Figure 1 is a view in perspective showing the positions which the plowshare-pattern and myim proved sectional chill assume when molding. Fig. 2 is a similar view, showing the removable section removed to allow the pattern to be withdrawn from the flask. Fig. 3 represents the body of the chill. Fig. 4 represents the removable section thereof. Fig. 5 shows a longitudinal vertical section of the chill-sections as combined, and Fig. 6 shows a-view thereof in vertical cross-section.

The advantages of my improved chill over other and old forms, to which I desire to give particular emphasis, liein the increased facility it offers to molding, and the symmetry and perfection of the plowshares produced by its use.

Arepresents the plowshare-pattern, of which the under face is exposed; B, the lower section of the chill, and O the upper removable section thereof. The pattern and chill sections are shown in the positions obtaining to them in the this]: when molding. The lower section, B, of the chill is constructed of a single piece of cast-iron, and while it may vary somewhat in shape, accordingly as convenience may dictate and the varying styles of plowshares which the trade may demand, its form will be substantially the same as shown. The said chill-section is provided with a channel, D, extending longitudinally of itslen gth, and which is adapted to receive the lower edge, E, of the removable chill-section (J, and also to form in connection therewith a channel, A, in which the nose and loweredge of the share are formed and chilled, said latter channel, A, being formed between the inner face of the outer wall, F, of section B and the inner face of the movable section O, which is held from lateral movement by the outer wall, B, of the lower section, B, of the chill. The bottom of this latter channel is formed by a ledge, a, which extends the entire length of the outer wall, F, of section B. The upper face of the removable chill-section O is provided with two or more lugs, a, for the convenience of the molder in withdrawing the said section for the removal of the plowshare-pattern when molding, and in replacing it after molding and preparatory to gating the flask for pouring. Direct longitudinal and vertical movement of the section O is guarded against and prevented by looking devices formed at each end of the chill sections. The rear end of the section B is mortised, as at G, to receive the lug H, formed on the rear end of the removable section 0, and the forward end of said section B, which is upwardly inclined to form the plowshare-nose, is provided with a mortise, J, to receive the lngK, formed on the forward end of section 0.

It will thus be seen from the above, and from viewing the drawings, that the removablesec tion 0 can only be withdrawn from andreplaced in the section B by a movement followin g a line parallel with and extended from the inclined plane L, representing the bottom of that portion of the channel A which forms the nose of the plowshare, and that, although the chill is made sectional, when. the sections are joined together they are adapted to resist all disturbing influences, except in one direction, that being one which, in the operation ofmolding and pouring, is open to no disturbance. Achill is thus produced which combines, in addition to the valuable feature of offering great facilities for rapid and perfect molding, exeellentadaptation to the expansion caused by being suddenly heated by the molten iron as it is poured into the flask. These two valuable features obtained, and resulting from the use of my chill, will be treated in the order of citation.

In instance of the employment of a solid chill to chill the nose and edges of a plowshare, it is necessary to remove it with the pattern and to replace it in the flask again after the pattern has been withdrawn. These disturbances caused by withdrawing and replacing the entire chill are very apt, even when most carefully and skillfully performed,'to displace the sand, and break that perfection of outline in the mold so much desired by molders and so highly important to the product of the cast.

I obviate these diffleulties by forming the upper section, 0, of the chill removable, thereby allowing the pattern to be withdrawn from the flask without the removal of the entire chill, and by so arranging this removable section that it may be separated from and connected to the lower section while the same is in the flask, and after the mold for the share has been formed, without disturbing or breaking the sand mold.

In casting and chilling plowshares it is necessary to pour the molten metal "cry rapidly into the flask in order to avoid the danger of whatis known to foundry-men as cold short, and to prevent notched and imperfect edges,

. resulting from the action of the chill in retarding the flow of metal. This rapid pouring causes the chill to suddenly expand and change, destroyingthe symmetrical outline of the edges and nose of the plowshare, involving great labor in grinding them'to the required form. By forming the chill in two sections this difficulty is overcome, inasmuch as the two sections-can expand independently of each other without perceptibly changing the shape of the channel in which the nose and edge of the'plowshare are to be formed.

The manner in which I use my chill will be too apparent to those familiar with the molding and casting art to need a detailed description thereof. It is also unnecessary to state the changes in the molecular structure of the iron which results from the sudden contact of the molten metal with the cold chill and the consequent redisposition of the elements having the iron and carbon physically combined, as these changes are well understood by all foundry-men.

I would have it understood that I do not limit myself to the exact construction shown and described, but hold myself at liberty to make such slight changes and alterations as fairly fall within the spirit and scope of my invention.

Having fully described my invention, what I claim as new, and desire to secure byLetters Patent, is

1. In a sectional plow-chill, the combination, with the lower section having a channel extending the entire length thereof, of an upper'section having a portion received in the channel of the lower section and forming therewith a chill adapted in form for chilling the nose and edges of plowshares, substantially as set forth.

2. A sectional plow-chill composed of an upper andlower section, adapted, when joined, to chill the opposite edges and nose of a plowshare, the upper section of said chill being arranged to be removable and replaceable on the lower section thereof when in the flask, and without injury to the mold, substantially as set forth.

8. -A sectional plow-chill composed of an upper and lower section, the lower section having a channel extending its entire length, said channel receiving the lower edge of the upper chill-section and forming, with the inner face thereof, a channel to receive and chill the molten metal forming the nose and edge ofa plowshare, substantially as set forth.

4. A sectional plow-chill composed of an upper and lower section, the lower section being provided with a channel receiving the lower edge of the upper section, said lower section being also provided with inortises at each end thereof, which receive lugs formed on each end of the upper section, substantially as set forth.

5. A sectional plowchill composed of an upper and lower section, the lower section be ing provided with a channel receiving the lower edge of the upper section, said upper section beingprovided with two or more lugs, by which it is handled in connecting it to and disconnecting it from the said lower section, substantially as set forth.

6. A sectional plow-chill composed 'of an upper and lower section, the lower section beingprovided with achannel receiving the lower edge of the upper section, and forming, with the inner face thereof, a channel to form the nose and edge of the plowshare, a narrow ledge extending the length of the outer wall of the lower section forming'the bottom of this lastmentioned channel, substantially as set forth.

7. A two-part chill constructed to form a channel for chilling the edge and nose of a plowshare, said parts'being constructed to be locked and unlocked by moving one part on the other, substantially as set forth.

In testimony that I claim the foregoing I have hereunto set my hand this 8th day of March, 1881.

CHARLES ANDERSON. Witnesses:

G. R. STIOKNEY, O. E. CROUCH. 

